diff --git a/cmake/Modules/LocalAom.cmake b/cmake/Modules/LocalAom.cmake
index ebeae0eeec..7acd0d6c1a 100644
--- a/cmake/Modules/LocalAom.cmake
+++ b/cmake/Modules/LocalAom.cmake
@@ -12,7 +12,7 @@ else()
 endif()
 
 set(AOM_EXT_SOURCE_DIR "${AVIF_SOURCE_DIR}/ext/${AOM_PACKAGE_NAME}")
-set(LIB_FILENAME "${AVIF_SOURCE_DIR}/ext/aom/build.libavif/${CMAKE_STATIC_LIBRARY_PREFIX}aom${CMAKE_STATIC_LIBRARY_SUFFIX}")
+set(LIB_FILENAME "${AOM_EXT_SOURCE_DIR}/build.libavif/${CMAKE_STATIC_LIBRARY_PREFIX}aom${CMAKE_STATIC_LIBRARY_SUFFIX}")
 
 if(EXISTS "${LIB_FILENAME}")
     message(STATUS "${AOM_MESSAGE_PREFIX}: compiled library found at ${LIB_FILENAME}")